Two data layers with the same name (counting starts from 1 again in an saved session file)

[Klumbumbus]

What steps will reproduce the problem?

1. create a new layer. it is named (in german josm) "Datenebene 1"
2. draw a node
3. save session
4. restart josm
5. open previously saved session
6. create one more new data layer

What is the expected result?

new data layer is named "Datenebene 2"

What happens instead?

new data layer is named "Datenebene 1" again.

Please provide any additional information below. Attach a screenshot if possible.

The next new data layer is then named "Datenebene 2". It seems that the counting is not saved within the session file.
Same problem if JOSM is set to english.
I didn't check an old josm version, so I don't know if this is a regression or if it was this way from the beginning.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-09-18 22:05:48 +0200 (Sun, 18 Sep 2016)
Build-Date:2016-09-19 01:36:38
Revision:11025
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11025 de) Windows 7 32-Bit
Memory Usage: 247 MB / 870 MB (96 MB allocated, but free)
Java version: 1.8.0_102-b14, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1680x1050
Maximum Screen Size: 1680x1050
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=C:\Program Files\josm-latest-bla.jnlp, -Djnlpx.remove=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=256m,900m, -Djnlpx.splashport=58996, -Djnlpx.jvm=<java.home>\bin\javaw.exe, -Djnlpx.vmargs=LURqYXZhLnV0aWwuQXJyYXlzLnVzZUxlZ2FjeU1lcmdlU29ydD10cnVlAA==]
Dataset consistency test: No problems found

Plugins:
+ AddrInterpolation (32699)
+ DirectDownload (32699)
+ DirectUpload (32699)
+ HouseNumberTaggingTool (32699)
+ OpeningHoursEditor (32699)
+ alignways (32921)
+ apache-commons (32699)
+ apache-http (32699)
+ buildings_tools (32944)
+ editgpx (32699)
+ imagery_offset_db (32796)
+ log4j (32699)
+ photo_geotagging (32699)
+ photoadjust (32863)
+ reverter (32796)
+ tag2link (32941)
+ tagging-preset-tester (32869)
+ terracer (32699)
+ turnlanes-tagging (245)
+ turnrestrictions (32796)
+ undelete (32699)
+ utilsplugin2 (32815)
+ wikipedia (32884)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/StolpersteineLight&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/NewTags&zip=1
+ D:\<user.name>\OSM\JOSMSVN\data\defaultpresets.xml
+ https://raw.githubusercontent.com/yopaseopor/traffic_signs_preset_JOSM/master/DE.zip

Map paint styles:
+ D:\<user.name>\OSM\JOSMSVN\styles\standard\elemstyles.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/HiDPISupport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/sac_scale&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ShowID&zip=1
+ D:\<user.name>\OSM\eigene styles\PriorityRoad\PriorityRoad_1.0.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/LayerChecker&zip=1
+ D:\<user.name>\OSM\TestNew\newicons.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Surface&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&style&zip=1
- D:\<user.name>\OSM\patches\old MPs\dataquality.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Sidewalks&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Cycleways&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Osmc&style&zip=1
- https://raw.githubusercontent.com/species/josm-preset-wheelchair/master/sidewalks_kerbs.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/LitObjects&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lit&style&zip=1
- D:\<user.name>\OSM\eigene styles\Tourenplanung.mapcss
- D:\<user.name>\OSM\eigene styles\SpecificBuildingValues\SpecificBuildingValues.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_buildings&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Modified&zip=1
- https://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip
- http://www.openrailwaymap.org/styles/standard.mapcss
- D:\<user.name>\OSM\eigene styles\area-symbol.zip
- http://www.freietonne.de/ft_icons/josm/FreieTonne_rules_presets_zip.php
- https://josm.openstreetmap.de/josmfile?page=Styles/NewHighwayColors&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/MaxspeedIcons&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/DestinationSignRelation&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Incline&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PTStops&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/AdvertisingStyle&zip=1
- https://www.dropbox.com/s/qo3ai47fpv241jf/Styles_Fixme_and_Notes.zip?raw=1
- https://github.com/gmgeo/osmic-josm-style/archive/master.zip
- D:\<user.name>\OSM\eigene styles\Coloured Streets\ColouredStreets3.48_01 adapt pise changes of default style.mapcss

Validator rules:
+ https://raw.githubusercontent.com/stefan-a-bauer/josm-validators/master/mtb.validator.mapcss
+ D:\<user.name>\OSM\TestNew\new.validator.mapcss

Last errors/warnings:
- E: Fehler beim Laden des Bildes 'traffic_signs/ES/ES_r2.png'
- W:  Traffic sign (manual): Could not get presets icon traffic_signs/ES/ES_r2.png

[simon04]

In 11033/josm:

fix #13663 - Two data layers with the same name

Counting starts from 1 again in an saved session file.

[simon04]

Milestone renamed